PHP and email addresses

[Nick Bell]

The expression:

preg_match_all( "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i",$f,
$matches);

Returns ONE email address on a line in $f beginning 'text' - how do I
retrieve ALL the email addresses on a line in $f beginning 'text' in php?

Many thanks

Nick

[Rik]

Re: PHP and email addresses

Nick Bell wrote:[color=blue]
> The expression:
>
> preg_match_all( "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i",$f,
> $matches);
>
> Returns ONE email address on a line in $f beginning 'text' - how do I
> retrieve ALL the email addresses on a line in $f beginning 'text' in
> php?
>
> Many thanks[/color]

Without looking further at e-mail validation, adjust:
"/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i"
to:
"/^text(:?.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}))*/i"

Note that your regex will think .@..xx a valid email-adress.

Grtz,
--
Rik Wasmus

[Nick Bell]

Re: PHP and email addresses

Rik wrote:[color=blue]
> Nick Bell wrote:[color=green]
>> The expression:
>>
>> preg_match_all( "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i",$f,
>> $matches);
>>
>> Returns ONE email address on a line in $f beginning 'text' - how do I
>> retrieve ALL the email addresses on a line in $f beginning 'text' in
>> php?
>>
>> Many thanks[/color]
>
> Without looking further at e-mail validation, adjust:
> "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i"
> to:
> "/^text(:?.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}))*/i"
>
> Note that your regex will think .@..xx a valid email-adress.
>
> Grtz,[/color]
Thanks. The $f is the result of file_get_conten ts(...) and the
'beginning of line' function ^ doesn't seem to detect the beginnings of
lines generated using this method.

Any thoughts?

Nick

[Rik]

Re: PHP and email addresses

Nick Bell wrote:[color=blue]
> Rik wrote:[color=green]
>> Nick Bell wrote:[color=darkred]
>>> The expression:
>>>
>>> preg_match_all( "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i",$f,
>>> $matches);
>>>
>>> Returns ONE email address on a line in $f beginning 'text' - how do
>>> I retrieve ALL the email addresses on a line in $f beginning 'text'
>>> in php?
>>>
>>> Many thanks[/color]
>>
>> Without looking further at e-mail validation, adjust:
>> "/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i"
>> to:
>> "/^text(:?.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}))*/i"
>>
>> Note that your regex will think .@..xx a valid email-adress.
>>
>> Grtz,[/color]
> Thanks. The $f is the result of file_get_conten ts(...) and the
> 'beginning of line' function ^ doesn't seem to detect the beginnings
> of lines generated using this method.[/color]

First: ^isn't a function.
Second: then try without:
"/text(:?.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6}))*/i"

Grtz,
--
Rik Wasmus

[Tim Roberts]

Re: PHP and email addresses

Nick Bell <me@privacy.net > wrote:
[color=blue]
>The expression:
>
>preg_match_all ("/text.*?([A-Z0-9._%-]+@[A-Z0-9._%-]+\.[A-Z]{2,6})/i",$f,
>$matches);
>
>Returns ONE email address on a line in $f beginning 'text' - how do I
>retrieve ALL the email addresses on a line in $f beginning 'text' in php?[/color]

This isn't foolproof by a long shot. Every printable character except [,
\, and ] is valid in an RFC2822 e-mail address, and even [ and ] can be
used if the address is wrapped in quotes.

The full regular expression required to match an RFC2822 compliant e-mail
address is more than 6,000 characters long, and is one of the gems in
Friedl's book "Mastering Regular Expressions".

It is common to use "*" in an e-mail address, for example. Sendmail has a
feature that uses it. If you send to "abc*def@joe.co m", it will try find
an alias for "abc*def" exactly. Failing that, it will send the message to
"abc@joe.co m". This is great for spam catching; I can sign up with web
sites as "timr*121@probo .com" without defining it, and if I get to much
spam, I just add a specific alias for that which routes to null.
--
- Tim Roberts, timr@probo.com
Providenza & Boekelheide, Inc.